scholarly journals Single Inductor Multiple Output Auto-Buck-Boost DC–DC Converter with Error-Driven Randomized Control

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1335 ◽  
Author(s):  
Hyunbin Park ◽  
Shiho Kim
Keyword(s):  
Steady State ◽  
Current Level ◽  
Sequential Order ◽  
Load Demand ◽  
Sequential Selection ◽  
Randomized Control ◽  
Selection Of ◽  
Driving Capability ◽  
Delayed Responses

We propose a single inductor multiple output (SIMO) auto-buck-boost DC–DC converter with error-driven randomized control (EDRC). The conventional controls in a SIMO DC–DC converter supply power to outputs that have been selected in a sequential order. Furthermore, they control the inductor current levels at either edge of a switching period in a steady state to be at the same level to alleviate cross-regulation. However, this limits the flexibility of the converter to respond to changes in load requirements. A sequential selection of light loads results in these loads being selected more often than a load demand, degrading the efficiency for light loads. In addition, limited flexibility leads to delayed responses. This paper introduces an auto-buck-boost topology that selects outputs based on output errors, and instantaneously adjusts the inductor current level. Moreover, we propose a technique for allowing any output to avoid selection when all outputs are fully supplied. The proposed EDRC scheme achieves improvements in efficiency in regards to light loads, cross-regulation, and output driving capability.

Selection of one-dimensional sedimentation: models for on-line use

1995 ◽  
Vol 31 (2) ◽  
pp. 193-204 ◽  
Author(s):  
Koen Grijspeerdt ◽  
Peter Vanrolleghem ◽  
Willy Verstraete
Keyword(s):  
Steady State ◽  
Selection Criteria ◽  
Data Sets ◽  
Concentration Profiles ◽  
A Posteriori ◽  
One Dimensional ◽  
On Line ◽  
Dynamic Concentration ◽  
Selection Of ◽  
Modelling Task

A comparative study of several recently proposed one-dimensional sedimentation models has been made. This has been achieved by fitting these models to steady-state and dynamic concentration profiles obtained in a down-scaled secondary decanter. The models were evaluated with several a posteriori model selection criteria. Since the purpose of the modelling task is to do on-line simulations, the calculation time was used as one of the selection criteria. Finally, the practical identifiability of the models for the available data sets was also investigated. It could be concluded that the model of Takács et al. (1991) gave the most reliable results.

Optimum Selection of Hydraulic Devices for Water Hammer Control in the Pipeline Systems Using Genetic Algorithm

2003 ◽  
Author(s):  
Bong Seong Jung ◽  
Bryan W. Karney
Keyword(s):  
Genetic Algorithm ◽  
Steady State ◽  
Optimization Problems ◽  
System Optimization ◽  
Water Hammer ◽  
Pipeline System ◽  
Optimal Size ◽  
Protection Strategy ◽  
Hydraulic Devices ◽  
Selection Of

Genetic algorithms have been used to solve many water distribution system optimization problems, but have generally been limited to steady state or quasi-steady state optimization. However, transient events within pipe system are inevitable and the effect of water hammer should not be overlooked. The purpose of this paper is to optimize the selection, sizing and placement of hydraulic devices in a pipeline system considering its transient response. A global optimal solution using genetic algorithm suggests optimal size, location and number of hydraulic devices to cope with water hammer. This study shows that the integration of a genetic algorithm code with a transient simulator can improve both the design and the response of a pipe network. This study also shows that the selection of optimum protection strategy is an integrated problem, involving consideration of loading condition, device and system characteristics, and protection strategy. Simpler transient control systems are often found to outperform more complex ones.

Participant Vocabulary Use and Selection Differences in Serial Versus Parallel Presentation of Product Reaction Cards

2021 ◽  
pp. 106480462110599
Author(s):  
Michelle Spinelli ◽  
Nicholas Kelling ◽  
Mark Morris ◽  
David Neira ◽  
Silvia Convento ◽  
...  
Keyword(s):  
Presentation Modality ◽  
Sequential Order ◽  
Sequential Condition ◽  
Word Selection ◽  
Selection Of

This study looks at the effects on users’ choices when presented with Product Reaction Cards (PRC) in parallel and sequential order. Participants were given brief tasks on two websites and presented with PRC in parallel or sequential order to describe their sentiments. We found that participants selected 25% more words in the sequential condition, including the selection of more positive words (23%). However, the sequential condition took on average 5 minutes longer to complete word selection. Therefore, it is important to understand that the PRC presentation modality can affect the quantity and the choice of vocabulary used by participants.

Comparison of Controllers for a UAV with Integral Effect and Kalman Estimator: By Bessel Polynomials and LQR

2013 ◽  
Vol 436 ◽  
pp. 54-60 ◽  
Author(s):  
Wenceslao Eduardo Rodríguez ◽  
Ramiro Ibarra ◽  
Gerardo Romero ◽  
David Lara ◽  
Jaime Arredondo ◽  
...  
Keyword(s):  
Steady State ◽  
Pole Placement ◽  
Control Technique ◽  
State Estimator ◽  
Control Laws ◽  
State Response ◽  
Integral Effect ◽  
Aerial Vehicle ◽  
Pole Placement Controller ◽  
Selection Of

This paper presents the development of two different control techniques as an approach having to remove steady-state error present in the response of attitude of a mini unmanned aerial vehicle. A problem that arises when performing pole placement controller is the selection of the poles, the Bessel approximation allows the selection of the eigenvalues in function to a specified response time for a feedback pole placement controller and state estimator (observer). On the other hand presents an optimal control technique combined with Kalman filter to estimate the state affected by perturbations in the system, both cases using the integral effect to eliminate the steady state error.These two control laws has the property of responding to a desired response according to a time or state response desired.

BEYOND THE STEADY STATE: MANAGING DISCONTINUOUS PRODUCT AND PROCESS INNOVATION

2006 ◽  
Vol 10 (02) ◽  
pp. 175-196 ◽  
Author(s):  
WENDY PHILLIPS ◽  
HANNAH NOKE ◽  
JOHN BESSANT ◽  
RICHARD LAMMING
Keyword(s):  
Steady State ◽  
Relative Stability ◽  
Good Practice ◽  
Innovation Process ◽  
Effective Management ◽  
Product And Process Innovation ◽  
Good Guide ◽  
Product And Process ◽  
Discontinuous Innovation ◽  
Selection Of

Research on the innovation process and its effective management has consistently highlighted a set of themes constituting "good practice". The limitation of such "good practice" is that it relates to what might be termed "steady state" innovation — essentially innovative activity in product and process terms which is about "doing what we do, but better". The prescription works well under these conditions of (relative) stability in terms of products and markets but is not a good guide when elements of discontinuity come into the equation. Discontinuity arises from shifts along technological, market, political and other frontiers and requires new or at least significantly adapted approaches to their effective management. This paper highlights empirical findings from a selection of companies involved in a project sponsored by the U.K. Department of Trade and Industry. The results indicate a number of key routines that organisations could implement to enable discontinuous innovation.

Estimation of Performance and Sequential Selection of Diagnostic Tests in Patients With Lung Lesions Suspicious for Cancer

2002 ◽  
Vol 126 (1) ◽  
pp. 19-27
Author(s):  
Dana Marie Grzybicki ◽  
Thomas Gross ◽  
Kim R. Geisinger ◽  
Stephen S. Raab
Keyword(s):  
Diagnostic Test ◽  
Test Performance ◽  
Diagnostic Tests ◽  
Needle Aspiration ◽  
Selection Strategy ◽  
Test Selection ◽  
Lung Lesions ◽  
Sequential Selection ◽  
Test Ordering ◽  
Selection Of

Abstract Context.—Measuring variation in clinician test ordering behavior for patients with similar indications is an important focus for quality management and cost containment. Objective.—To obtain information from physicians and nonphysicians regarding their test-ordering behavior and their knowledge of test performance characteristics for diagnostic tests used to work up patients with lung lesions suspicious for cancer. Design.—A self-administered, voluntary, anonymous questionnaire was distributed to 452 multiple-specialty physicians and 500 nonphysicians in academic and private practice in Pennsylvania, Iowa, and North Carolina. Respondents indicated their estimates of test sensitivities for multiple tests used in the diagnosis of lung lesions and provided their test selection strategy for case simulations of patients with solitary lung lesions. Data were analyzed using descriptive statistics and the χ2 test. Results.—The response rate was 11.2%. Both physicians and nonphysicians tended to underestimate the sensitivities of all minimally invasive tests, with the greatest underestimations reported for sputum cytology and transthoracic fine-needle aspiration biopsy. There was marked variation in sequential test selection for all the case simulations and no association between respondent perception of test sensitivity and their selection of first diagnostic test. Overall, the most frequently chosen first diagnostic test was bronchoscopy. Conclusions.—Physicians and nonphysicians tend to underestimate the performance of diagnostic tests used to evaluate solitary lung lesions. However, their misperceptions do not appear to explain the wide variation in test-ordering behavior for patients with lung lesions suspicious for cancer.

DEVELOPMENT OF FLOOD FORECASTING TECHNIQUE BY COMBINING DNN AND DATA ASSIMILATION TO ENABLE SEQUENTIAL SELECTION OF ASSIMILATION VARIABLES

2020 ◽  
Vol 76 (2) ◽  
pp. I_421-I_426
Author(s):  
Masashi MORIYA ◽  
Shin FUKAKUSA ◽  
Hiroki TSUJIKURA ◽  
Yoshitomo YONESE ◽  
Yuji TANAKA
Keyword(s):  
Data Assimilation ◽  
Flood Forecasting ◽  
Sequential Selection ◽  
Selection Of

Experiments in Environment Integration

1994 ◽  
Author(s):  
Alan W. Brown ◽  
David J. Carney ◽  
Edwin J. Morris ◽  
Dennis B. Smith ◽  
Paul F. Zarrella
Keyword(s):  
Production Quality ◽  
Current Level ◽  
Third Party ◽  
Tool Integration ◽  
Current State ◽  
Internal Structures ◽  
Framework Technology ◽  
Per Se ◽  
Development Approach ◽  
Selection Of

In assembling a CASE environment from a collection of commercial off-theshelf (COTS) tools, tool users must find ways to connect the tools such that they provide adequate support for their particular software development approach. This task takes place in the context of limited knowledge of the tools, limited access to the source or internal structures of the tools, limited resources with which to perform and maintain the tool connections, and evolving understanding of the needs of the tool users. This places severe restrictions on what can be attempted in terms of tool interconnection. Environment framework technologies (e.g., ECMA PCTE, ATIS, BMS, ToolTalk, or CORBA) claim to provide a set of common integration services that aid in the tool integration process. There have been numerous discussions about the value, maturity, and complexity of these framework technologies. Such discussions are characterized by three points: general agreement that framework technology per se is a valuable goal to pursue; moderate disagreement as to whether the current level of framework technology is a sufficient basis for production quality CASE environments; and considerable disagreement about which of the current technologies are the most likely to mature and succeed. Notable about these discussions, however, is that there has not been extensive use of the technologies in question. This stems from several sources: their expense, their unfamiliarity and complexity to current tool users, and a widespread concern about their immaturity. This lack of use is perhaps understandable, but it has had the additional effect that partisans of one or another technology have made assertions based on little factual information about the relative merits of the technology in question. To expand our own expertise in tool integration and framework technologies, and to answer the question, “What tool integrations are possible for third-party tool users given the current state of COTS tools and integration technology?” we performed a set of experiments involving the integration of a collection of common COTS tools with environment framework technologies in support of a typical development scenario. Our selection of these tools and technologies was based on common availability and application to the development scenario(s) of interest.

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